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## Index: H

h command: 2.4.1. Simple Control Mode Commands
hangup (HUP): 8.4.3. Ignoring Signals
hard/soft limits: 10.2.2. ulimit
hash mark (#)
  ## pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    6.2.3. Arithmetic Variables and Assignment
  as built-in variable: 4.2.1. Positional Parameters
  as command: 2.4.7. Miscellaneous Commands
  as pattern-matching operator: 4.5.3. Pattern-Matching Operators
    4.5.3. Pattern-Matching Operators
    4.7. Advanced Examples: pushd and popd
    5.5. while and until
  indicating comments: 4.5.1. Syntax of String Operators
  size of arrays and: 6.4.1. Indexed Arrays
head command: 6.2.3. Arithmetic Variables and Assignment
  string operators and: 4.5.1. Syntax of String Operators
header lines, extracting: 7.1.1. Here-Documents
help: 1.5.2. Built-in Help
here-documents: 7.1.1. Here-Documents
  deleting leading TABs in: 7.1.1. Here-Documents
hidden files: 1.6.2. Filenames and Wildcards
  3.1. The .profile File
hist command: 2. Command-Line Editing
  2.1. Enabling Command-Line Editing
  2.5. The hist Command
  -l option to: 2.5. The hist Command
HISTCMD variable: 3.4.2.4. Using history command numbers
HISTEDIT variable: 2.5. The hist Command
  3.4.2.1. Editing mode variables
HISTFILE variable: 2.2. The History File
  3.4.2.1. Editing mode variables
  3.5.1. Environment Variables
history alias: 2.5. The hist Command
history file: 2.2. The History File
  navigating
    in emacs-mode: 2.3.4. Moving Around in the History File
    in vi-mode: 2.4.4. Moving Around in the History File
  printing to: 7.2.1.2. Options to print
history mechanism, in C shell: 2. Command-Line Editing
  2.1. Enabling Command-Line Editing
  2.5. The hist Command
HISTSIZE variable: 2.2. The History File
HOME variable: 3.4.2.10. Miscellaneous variables
  3.5.1. Environment Variables
  using to replace tilde: 7.3.2. Substitution Order
hostname command: 4.6. Command Substitution
HP-UX: 1. Korn Shell Basics
HUP (hangup): 8.4.3. Ignoring Signals

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